I count 5 ...
1) Buddy Ryan (Eagles 1986-1990 and Cardinals 1994-1995) and son Rex (Jets 2009-present).
2) Bum Phillips (Oilers 1975-1980 and Saints 1981-1985) and son Wade (Saints 1985, Broncos 1993-1994, Bills 1998-2000, Falcons 2003, Cowboys 2007-2010).
3) Jim Mora (Saints 1986-1996 and Colts 1998-2001) and son Jim (Falcons 2004-2006 and Seahawks 2009).
4) Dick Nolan (49ers 1968-1975 and Saints 1978-1980) and son Mike (49ers 2005-2008).
5) Don Shula (Colts 1963-1969 and Dolphins 1970-1995) and son David (Bengals 1992-1996).
There are currently 30 head coaches
The Steelers have had a total of 14 head coaches between Forrest Douds (1933) and Mike Tomlin (present).
george seifert and Jim caldwell
For instance, let's use the Vikings; With 3 head coaches. The have 8 offensive coaches, including quarterbacks and wide receivers. 7 defensive coaches including line backers, defensive backs and line. And five other staffs/coaches for conditioning and strengthening.
The Vikings, in their 48 seasons have had only seven head coaches. Norm Van Brocklin Bud Grant Les Steckel (only one year) Jerry Burns Dennis Green Mike Tice Brad Childress
5
As of right now the Buffalo Bills have had 15 different head coaches.
1 head coach (hence the name "head") but can have up to as many 'other' coaches. (abviousley not anything above 10)
Since 1933, the Steelers have had 16 different head coaches.
7
One
There are currently 30 head coaches
28
3
27
Through the 2007 season, the Saints have had 14 head coaches. Click on the 'New Orleans Saints Head Coaches' link on this page to see who has coached the Saints and what their all time record was.
17